/*
    开发环境配置：能让代码运行
        运行项目指令：
            webpack 会将打包结果输出出去
            npx webpack-dev-server  只会在内存中编译打包，没有输出
 */

const {resolve} = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin')

module.exports = {
    entry: './src/js/index.js',

    output: {
        filename: 'js/built.js',
        path: resolve(__dirname, 'build')
    },

    module: {
        rules: [
            // loader的配置
            {
                // 处理css资源
                test: /\.css$/,
                use: [
                    'style-loader',
                    'css-loader'
                ]
            },
            {
                // 处理less资源
                test: /\.less$/,
                use: [
                    'style-loader',
                    'css-loader',
                    'less-loader'
                ]
            },

            // 处理图片资源
            {
                test: /\.(jpg|png|gif)$/,
                loader: 'url-loader',
                options: {
                    limit: 8 * 1024,
                    name: '[hash:10].[ext]',
                    // 关闭ES6模块化
                    esModule: false,
                    outputPath: 'imgs'
                }
            },

            // 处理html中img资源
            {
                test: /\.html$/,
                loader:'html-loader',
                options: {
                    esModule: false
                }
            },

            // 处理其他资源
            {
                exclude: /\.(html|js|css|less|png|jpg|gif)$/,
                loader: 'file-loader',
                options: {
                    name: '[hash:10].[ext]',
                    outputPath: 'media'
                }
            }

        ]
    },

    plugins: [
        // plugins的配置
        new HtmlWebpackPlugin({
            template: './src/index.html'
        })
    ],

    mode: 'development',

    // 开发环境
    devServer: {
        contentBase: resolve(__dirname, 'build'),
        compress: true,
        port: 9999,
        open: true
    }
}